Comparing Lengths Using Real Objects

This video tutorial teaches how to compare the lengths of objects using real objects like paperclips, erasers, and cubes. It explains the process of measuring by aligning objects end-to-end and highlights common mistakes such as leaving gaps. The tutorial includes examples of measuring a math book with paperclips, comparing pencil lengths with erasers, and determining the height difference between a desk and a chair using cubes. The video emphasizes the importance of accurate alignment and subtraction to find differences in length.

What is a common mistake when measuring lengths with smaller objects like paperclips?

• Using too many objects

• Using different types of objects

• Not aligning the objects properly

• Counting the objects twice

How many erasers long is the second pencil?

• Three erasers

• Four erasers

• Five erasers

• Six erasers

What is the difference in length between the two pencils?

• One eraser

• Two erasers

• Four erasers

• Three erasers

If a math book is 11 cubes long and a history book is 7 cubes long, what is the difference in their lengths?

• 2 cubes

• 5 cubes

• 3 cubes

• 4 cubes

How much taller is Mary's desk compared to the seat of her chair?

• 14 cubes

• 17 cubes

• 15 cubes

• 16 cubes